Water treatment system

Abstract

The utility model relates to the technical field of water, wastewater, sewage or sludge treatment, and provides a water treatment system which comprises a sewage treatment unit, the system comprises a grating tank, an aerated grit chamber, a homogenizing tank, a primary efficient sedimentation tank, a hydrolysis acidification tank, an improved A / A / O biological tank, a secondary sedimentation tank, a secondary efficient sedimentation tank, a fiber turntable filter tank, a disinfection tank and a Pasteur metering tank, the sludge treatment unit comprises a sludge storage tank and a sludge thickening and dewatering workshop, and a sludge inlet of the sludge storage tank is provided with a primary sludge sedimentation pipeline communicated to a sludge outlet of the primary efficient sedimentation tank and a secondary sludge sedimentation pipeline communicated to a sludge outlet of the secondary efficient sedimentation tank; the odor treatment unit comprises an odor collecting device, a washing humidifying tower, a deodorization fan and a bio-trickling filter, and an air inlet of the odor collecting device is provided with an air pipeline communicated with the sewage treatment unit and the sludge treatment unit. Therefore, sewage, sludge and odor can be treated synergistically, and environmental pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water, wastewater, sewage or sludge treatment, in particular to a water treatment system. Background Art

[0002] With the rapid development of urban construction, the discharge of sewage has increased, and the problem of environmental pollution has become increasingly prominent. In addition to the pollution caused by sewage, the sludge and odor generated by sewage treatment will also pollute the environment. Specifically, solid sediment in the form of sludge will be produced during the sewage treatment process, which is easy to decompose and stink. In the process of sewage treatment and sludge drying, some odorous substances mainly composed of hydrogen sulfide and methane will be produced. The odor will cause adverse reactions to people who are in this environment for a long time, which is very harmful to the surrounding environment.

[0003] In order to reduce environmental pollution, sewage needs to be introduced into sewage treatment plants for treatment before being discharged. However, traditional sewage treatment plants have poor treatment effects on sewage, sludge and odor. They generally treat sludge by direct dumping, simple landfill or incineration, and use incineration to treat odor, which can easily cause secondary pollution and lead to odor leakage, which is not conducive to environmental protection.

[0004] Therefore, the present application proposes a water treatment system that can effectively treat sewage, sludge and odor and reduce environmental pollution. Utility Model Content

[0005] The utility model aims to provide a water treatment system, aiming to improve the problem that the existing sewage treatment plants have poor treatment effects on sewage, sludge and odor.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A water treatment system, comprising:

[0008] The sewage treatment unit includes a grating tank, an aerated grit tank, a homogenizing tank, a primary high-efficiency sedimentation tank, a hydrolysis acidification tank, an improved A / A / O biological tank, a secondary sedimentation tank, a secondary high-efficiency sedimentation tank, a fiber rotary filter tank, a disinfection tank, and a pasteurization metering tank, which are sequentially connected by pipelines along the water flow direction;

[0009] A sludge treatment unit, comprising a sludge storage tank and a sludge concentration and dehydration workshop connected in sequence by pipelines along a sludge conveying direction, wherein the sludge inlet of the sludge storage tank is provided with a primary sludge pipeline connected to the sludge outlet of the primary high-efficiency sedimentation tank, and a secondary sludge pipeline connected to the sludge outlet of the secondary high-efficiency sedimentation tank; and

[0010] The odor treatment unit comprises an odor collecting device, a washing and humidifying tower, a deodorizing fan and a biotrickling filter which are sequentially connected by pipelines along the odor conveying direction; the air inlet of the odor collecting device is provided with an air duct connected to the sewage treatment unit and the sludge treatment unit.

[0011] Preferably, the grid pool includes a coarse grid room, a lifting pump room and a fine grid room which are sequentially connected and arranged along the water flow direction.

[0012] Preferably, the sewage treatment unit further comprises an accident discharge pool, a water inlet of the accident discharge pool is connected to a water outlet of the homogenizing pool, and a water outlet of the accident discharge pool is connected to a water inlet of the coarse screen.

[0013] Preferably, the water outlet of the homogenization tank is provided with a bypass pipe connected to the water inlet of the hydrolysis acidification tank.

[0014] Preferably, the water outlet of the sludge concentration and dehydration workshop is provided with a filtrate conveying pipeline connected to the water inlet of the coarse screen room.

[0015] Preferably, the improved A / A / O biological pool is connected to a blower room.

[0016] Preferably, the disinfection tank is an ultraviolet disinfection tank, a liquid chlorine disinfection tank or an ozone disinfection tank.

[0017] Preferably, the sewage treatment unit further comprises a water distribution and mud discharge well, and the water distribution and mud discharge well is arranged between the improved A / A / O biological pool and the secondary sedimentation pool through a pipeline connection;

[0018] The mud outlet of the water distribution mud well is provided with a return sludge pipeline connected to the mud inlet of the improved A / A / O biological pool, and a residual sludge pipeline connected to the mud inlet of the hydrolysis acidification pool;

[0019] The residual sludge pipeline is provided with a sludge discharge pipeline connected to the sludge inlet of the sludge storage tank.

[0020] Preferably, the mud outlet and mud inlet of the hydrolysis acidification tank are connected to each other and a self-returning sludge pipeline is provided.

[0021] Preferably, the odor treatment unit also includes a circulating water tank, and the water outlets of the washing and humidifying tower and the biological trickling filter are connected to the water inlet of the circulating water tank, and the water outlet of the circulating water tank is provided with a first return pipe connected to the water inlet of the washing and humidifying tower, and a second return pipe connected to the water inlet of the biological trickling filter.

[0022] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0023] 1. The sewage treatment unit, sludge treatment unit and odor treatment unit are used in conjunction with each other to treat sewage, sludge and odor, which can improve the efficiency of treating sewage, sludge and odor. Through reasonable layout, the workload of each structure can be reasonably distributed to avoid overloading of some structures, ensure the normal operation of the water treatment system and extend its service life.

[0024] 2. The step-by-step treatment method is adopted to improve the treatment effect of sewage, sludge and odor, which can effectively avoid secondary pollution and protect the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the water treatment system described in the utility model;

[0026] Figure 2 It is a structural schematic diagram of a sewage treatment unit of a water treatment system according to the utility model;

[0027] Figure 3 It is a structural schematic diagram of a sludge treatment unit of a water treatment system according to the utility model;

[0028] Figure 4 It is a structural schematic diagram of the odor treatment unit of the water treatment system described in the utility model.

[0029] Description of reference numerals:

[0030] 100. Sewage treatment unit;

[0031] 101, screen pool; 1011, coarse screen room; 1012, lifting pump room; 1013, fine screen room;

[0032] 102. Aerated grit chamber; 103. Homogenizing tank; 1031. Beyond pipe;

[0033] 104. Primary high-efficiency sedimentation tank; 105. Hydrolysis acidification tank; 1051. Self-return sludge pipeline;

[0034] 106. Improved A / A / O biological pool; 1061. Blower room; 107. Secondary sedimentation tank;

[0035] 108. Secondary high-efficiency sedimentation tank; 109. Fiber rotary filter tank; 110. Disinfection tank;

[0036] 111. Pasteur metering tank; 112. Accident discharge pool; 113. Water distribution and mud discharge well;

[0037] 1131, return sludge pipeline; 1132, residual sludge pipeline; 11321, sludge discharge pipeline;

[0038] 200. Sludge treatment unit;

[0039] 201, sludge storage tank; 2011, primary sludge pipeline; 2012, secondary sludge pipeline;

[0040] 202. Sludge concentration and dehydration workshop; 2021. Filtrate delivery pipeline;

[0041] 300. Odor treatment unit;

[0042] 301. Odor collection device; 3011. Air duct; 302. Scrubbing and humidifying tower;

[0043] 303. Deodorizing fan; 304. Bio-trickling filter; 305. Circulating water tank;

[0044] 3051, a first return pipe; 3052, a second return pipe. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0046] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0048] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0049] Example

[0050] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides a water treatment system, including a sewage treatment unit 100, a sludge treatment unit 200 and an odor treatment unit 300.

[0051] The sewage treatment unit 100 includes a grating tank 101, an aerated grit tank 102, a homogenizing tank 103, a primary high-efficiency sedimentation tank 104, a hydrolysis acidification tank 105, an improved A / A / O biological tank 106, a secondary sedimentation tank 107, a secondary high-efficiency sedimentation tank 108, a fiber rotary filter 109, a disinfection tank 110 and a Pasteur metering tank 111, which are connected in sequence along the water flow direction through pipes. Specifically, the sewage flows into the grid pool 101, and the floating objects in the sewage are intercepted by the grid pool 101 to reduce the load of subsequent treatment. Then the sewage flows into the aerated grit chamber 102, where the sand particles in the sewage rub against each other and bear the shear force of aeration to remove the organic pollutants attached to the sand particles, and obtain relatively pure sand particles. Under the centrifugal force of the cyclone, the sand particles with higher density are thrown to the outside, and the organic matter with lower density flows into the homogenization tank 103 along with the sewage. The function of the homogenization tank 103 is to balance the water quality, mix the sewage of different water quality evenly, and perform drug addition treatment. After being treated by the homogenization tank 103, the sewage flows into the primary high-efficiency sedimentation tank 104, and the suspended matter and colloidal matter in the sewage are removed by adding coagulant in the primary high-efficiency sedimentation tank 104 to remove the organic matter and phosphorus in the sewage. Then the sewage flows into the hydrolysis acidification tank 105, and most of the suspended matter is removed by acidification, and the macromolecular organic matter is degraded into small molecular organic matter. The sewage treated in the hydrolysis acidification tank 105 then flows into the improved A / A / O biological tank 106. The improved A / A / O biological tank 106 has three different environments: anaerobic, anoxic and aerobic. The bacterial flora is mainly composed of nitrifying bacteria, denitrifying bacteria and polyphosphate bacteria. It also has the functions of removing organic matter and removing nitrogen and phosphorus. After being treated in the improved A / A / O biological tank 106, the sewage flows into the secondary sedimentation tank 107 to further remove some small organic particles. After sedimentation, the sewage flows into the secondary high-efficiency sedimentation tank 108. Through the adsorption and bridging effect of the polymer coagulant in the secondary high-efficiency sedimentation tank 108, the sewage flocculation and sedimentation effect is further improved. Then it flows into the fiber rotary filter 109, and the solid suspended matter in the sewage is removed by the filter cloth. The effluent water quality after filtration in the fiber rotary filter 109 is good, but before discharge, it needs to be disinfected in the disinfection tank 110 to remove residual bacteria and viruses. The sewage that meets the standards is metered and discharged into the river through the pasteurization metering tank 111. In this way, the sewage treatment unit 100 realizes the step-by-step treatment of sewage, thereby improving the sewage treatment effect.

[0052] The sludge treatment unit 200 includes a sludge storage tank 201 and a sludge concentration and dehydration workshop 202 which are sequentially connected by pipelines along the sludge conveying direction. The sludge generated during the sewage treatment process is discharged into the sludge storage tank 201 through the pipeline. Specifically, the mud inlet of the mud storage tank 201 is provided with a primary sludge pipe 2011 connected to the mud outlet of the primary high-efficiency sedimentation tank 104, and a secondary sludge pipe 2012 connected to the mud outlet of the secondary high-efficiency sedimentation tank 108. The sludge generated after the sewage is treated in the primary high-efficiency sedimentation tank 104 is discharged into the mud storage tank 201 through the primary sludge pipe 2011, and the sludge generated after the sewage is treated in the secondary high-efficiency sedimentation tank 108 is discharged into the mud storage tank 201 through the secondary sludge pipe 2012. Due to the change of water quantity and quality, the mud storage tank 201 can be used to temporarily store sludge. The sludge stored in the mud storage tank 201 can be discharged into the sludge concentration and dehydration workshop 202 for concentration and dehydration treatment to reduce the water content of the sludge, thereby reducing the volume of the sludge. After the sludge is concentrated and dehydrated, the sludge forms a mud cake and is transported out of the factory by truck. The sludge treatment unit 200 can effectively reduce the water content of the sludge, improve the efficiency of sludge treatment, and the treatment effect is good, which can avoid secondary pollution.

[0053] The odor treatment unit 300 includes an odor collecting device 301, a washing and humidifying tower 302, a deodorizing fan 303 and a biological trickling filter 304 which are connected in sequence through pipelines along the odor conveying direction. The odor collecting device 301 can be an air collecting hood, and the air inlet of the odor collecting device 301 is provided with an air duct 3011 connected to the sewage treatment unit 100 and the sludge treatment unit 200. The air duct 3011 is connected to the structures of the sewage treatment unit 100 and the sludge treatment unit 200 one by one, and the odor generated during the sewage treatment and sludge drying process is collected in a multi-point simultaneous suction manner. Specifically, the odor is collected by the odor collecting device 301 and enters the washing and humidifying tower 302. The washing and humidifying tower 302 can initially oxidize and degrade some pollutants in the odor. Then, driven by the deodorizing fan 303, the odor treated by the washing and humidifying tower 302 enters the bio-trickling filter 304. After the odor is purified and meets the standards in the bio-trickling filter 304, it can be discharged out of the factory from the exhaust port of the bio-trickling filter 304. The odor treatment unit 300 can improve the treatment effect of odor, prevent odor from escaping, and reduce the impact on the surrounding environment.

[0054] In this way, the sewage treatment unit 100, the sludge treatment unit 200 and the odor treatment unit 300 are used in combination to treat sewage, sludge and odor in a coordinated manner, thereby improving the treatment efficiency. Through reasonable layout and step-by-step treatment, the treatment effect of sewage, sludge and odor is improved, and the pollution to the environment is effectively reduced, which has good practicality.

[0055] like Figure 2As shown, in this embodiment, the screen pool 101 includes a coarse screen room 1011, a lifting pump room 1012 and a fine screen room 1013 which are sequentially connected and arranged along the water flow direction.

[0056] Specifically, the coarse screen room 1011 can intercept and remove larger impurities, floating objects and suspended objects in the sewage. The sewage filtered by the coarse screen room 1011 is transported to the fine screen room 1013 through the lifting pump room 1012. The fine screen room 1013 can intercept and remove smaller impurities, floating objects and suspended objects in the sewage. Using the coarse screen room 1011 and the fine screen room 1013 to filter the sewage in two stages can effectively reduce the load of subsequent sewage treatment work, thereby improving the effect and efficiency of the overall sewage treatment, while preventing excessive impurities from entering the subsequent structures to cause equipment blockage or damage, thereby extending the service life.

[0057] like Figure 1 and Figure 2 As shown, in this embodiment, the sewage treatment unit 100 also includes an emergency discharge tank 112, the water inlet of the emergency discharge tank 112 is connected to the water outlet of the homogenization tank 103, and the water outlet of the emergency discharge tank 112 is connected to the water inlet of the coarse screen room 1011.

[0058] Specifically, when an accident occurs in a factory, a large amount of high-concentration sewage will be discharged in a short period of time, which will bring a higher load to the sewage treatment unit 100. In order to avoid the impact on the sewage treatment unit 100, an accident discharge tank 112 is set up to temporarily store sewage. After being treated in the homogenization tank 103 to make the water quality of the sewage more balanced, it is discharged into the accident discharge tank 112 to prevent serious accidents in water quality or accidents that damage the operation of the water treatment system. After the accident is eliminated, the sewage stored in the accident discharge tank 112 is discharged into the coarse screen room 1011 and processed step by step through the sewage treatment unit 100.

[0059] like Figure 1 and Figure 2 As shown, in this embodiment, the outlet of the homogenizing tank 103 is provided with a bypass pipe 1031 connected to the water inlet of the hydrolysis acidification tank 105. Since there is less diversion in the previous work of sewage treatment and the sewage carries more impurities, the bypass pipe 1031 connected to the water inlet of the hydrolysis acidification tank 105 is provided at the outlet of the homogenizing tank 103, so that when an accident occurs in the primary high-efficiency sedimentation tank 104, such as water overload or failure to operate normally, the sewage is not treated by the primary high-efficiency sedimentation tank 104, but is directly discharged into the hydrolysis acidification tank 105 through the bypass pipe 1031, so as to reduce the load and extend the service life.

[0060] like Figure 1 and Figure 3As shown, in this embodiment, the outlet of the sludge concentration and dehydration workshop 202 is provided with a filtrate conveying pipeline 2021 connected to the water inlet of the coarse screen room 1011. In this way, the filtrate generated by the sludge concentration and dehydration workshop 202 for concentrating and dehydrating the sludge can flow into the coarse screen room 1011 through the filtrate conveying pipeline 2021, and after being processed step by step by the sewage treatment unit 100, it can be discharged into the river, thereby reducing the waste of water resources.

[0061] like Figure 1 and Figure 2 As shown, in this embodiment, the improved A / A / O biological pool 106 is connected to a blower room 1061. The blower room 1061 provides oxygen for the biochemical aerobic bacteria in the improved A / A / O biological pool 106, thereby ensuring the living environment of the bacteria and meeting the requirements of sewage treatment. At the same time, when the improved A / A / O biological pool 106 treats sewage, some unpleasant-smelling gases are generated, which are dangerous. To ensure environmental safety, the site can be ventilated through the blower room 1061.

[0062] like Figure 1 and Figure 2 As shown, in this embodiment, the disinfection pool 110 is an ultraviolet disinfection pool 110, a liquid chlorine disinfection pool 110 or an ozone disinfection pool 110. The type of disinfection pool 110 can be selected according to actual needs. Specifically, the ultraviolet disinfection pool 110 has the characteristics of no addition of chemical agents, no toxic and harmful by-products, fast disinfection speed and high efficiency; the liquid chlorine disinfection pool 110 has the characteristics of low cost, strong sterilization ability and simple process; the ozone disinfection pool 110 has the characteristics of high efficiency and no secondary pollution, can oxidize organic matter, and can sterilize, remove color, deodorize and deodorize. In addition to being able to effectively kill bacteria, it also has a clearing effect on various viruses.

[0063] like Figure 1 and Figure 2As shown, the sewage treatment unit 100 in this embodiment also includes a water distribution and sludge discharge well 113, which is connected by a pipeline and arranged between the improved A / A / O biological pool 106 and the secondary sedimentation tank 107. After being treated in the improved A / A / O biological pool 106, the sewage flows into the secondary sedimentation tank 107, and the precipitated sludge enters the water distribution and sludge discharge well 113 for sludge re-digestion treatment. The water distribution and sludge discharge well 113 is composed of a water distribution well and a sludge discharge well, and a sludge pump room is arranged in the sludge discharge well, wherein the water distribution well distributes the effluent of the improved A / A / O biological pool 106 into the secondary sedimentation tank 107, and the sludge discharge well transports the sludge to the improved A / A / O biological pool 106 through the return sludge pipe 1131, and transports the sludge to the hydrolysis acidification tank 105 through the residual sludge pipe 1132, and a sludge discharge pipe 11321 connected to the sludge inlet of the sludge storage tank 201 is arranged on the residual sludge pipe 1132, so that part of the sludge can be directly transported to the sludge treatment unit 200 through the sludge discharge pipe 11321 for treatment and then transported out, which can eliminate part of the sludge and avoid overload of some structures.

[0064] like Figure 1 and Figure 2 As shown, the mud outlet and mud inlet of the hydrolysis acidification tank 105 are connected to each other and a self-return sludge pipe 1051 is provided. The sludge self-return generated after the sewage is treated in the hydrolysis acidification tank 105 can replenish the sludge amount in the hydrolysis acidification tank 105. Since the hydrolysis acidification tank 105 can digest the sludge during operation, the load of the subsequent structures for treating the sludge can be reduced.

[0065] like Figure 1 and Figure 4 As shown, the odor treatment unit 300 in this embodiment also includes a circulating water tank 305, and the water outlets of the washing and humidifying tower 302 and the biological trickling filter 304 are connected to the water inlet of the circulating water tank 305, and the water outlet of the circulating water tank 305 is provided with a first return pipe 3051 connected to the water inlet of the washing and humidifying tower 302, and a second return pipe 3052 connected to the water inlet of the biological trickling filter 304. Since the washing and humidifying tower 302 and the bio-trickling filter 304 complete the deodorization work through gas-liquid mass transfer, a spray device is provided on the top of the washing and humidifying tower 302 and the bio-trickling filter 304. The water flow of the spray device is required to be continuous to ensure the normal operation of the washing and humidifying tower 302 and the bio-trickling filter 304. Therefore, a circulating water tank 305 is provided. After the effluent of the washing and humidifying tower 302 and the bio-trickling filter 304 flows into the circulating water tank 305, it is refluxed to the washing and humidifying tower 302 through the first reflux pipe 3051, and refluxed to the bio-trickling filter 304 through the second reflux pipe 3052, so as to realize the circulation of water and ensure the continuous water flow.

[0066] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A water treatment system, characterized in that: include: The sewage treatment unit includes a grating tank, an aerated grit tank, a homogenizing tank, a primary high-efficiency sedimentation tank, a hydrolysis acidification tank, an improved A / A / O biological tank, a secondary sedimentation tank, a secondary high-efficiency sedimentation tank, a fiber rotary filter tank, a disinfection tank, and a pasteurization metering tank, which are sequentially connected by pipelines along the water flow direction; A sludge treatment unit, comprising a sludge storage tank and a sludge concentration and dehydration workshop connected in sequence by pipelines along a sludge conveying direction, wherein the sludge inlet of the sludge storage tank is provided with a primary sludge pipeline connected to the sludge outlet of the primary high-efficiency sedimentation tank, and a secondary sludge pipeline connected to the sludge outlet of the secondary high-efficiency sedimentation tank; and The odor treatment unit comprises an odor collecting device, a washing and humidifying tower, a deodorizing fan and a biotrickling filter which are sequentially connected by pipelines along the odor conveying direction; the air inlet of the odor collecting device is provided with an air duct connected to the sewage treatment unit and the sludge treatment unit.

2. The water treatment system according to claim 1, characterized in that: The grid pool comprises a coarse grid room, a lifting pump room and a fine grid room which are sequentially connected and arranged along the water flow direction.

3. The water treatment system according to claim 2, characterized in that: The sewage treatment unit further comprises an emergency discharge pool, a water inlet of the emergency discharge pool is connected to a water outlet of the homogenizing pool, and a water outlet of the emergency discharge pool is connected to a water inlet of the coarse screen.

4. The water treatment system according to claim 3, characterized in that: The water outlet of the homogenization tank is provided with a bypass pipe connected to the water inlet of the hydrolysis acidification tank.

5. The water treatment system according to claim 3, characterized in that: The water outlet of the sludge concentration and dehydration workshop is provided with a filtrate conveying pipeline connected to the water inlet of the coarse grid room.

6. The water treatment system according to claim 1, characterized in that: The improved A / A / O biological pool is connected to a blower room.

7. The water treatment system according to claim 1, characterized in that: The disinfection pool is an ultraviolet disinfection pool, a liquid chlorine disinfection pool or an ozone disinfection pool.

8. The water treatment system according to claim 6, characterized in that: The sewage treatment unit further comprises a water distribution and mud discharge well, which is arranged between the improved A / A / O biological pool and the secondary sedimentation pool through a pipeline connection; The mud outlet of the water distribution mud well is provided with a return sludge pipeline connected to the mud inlet of the improved A / A / O biological pool, and a residual sludge pipeline connected to the mud inlet of the hydrolysis acidification pool; The residual sludge pipeline is provided with a sludge discharge pipeline connected to the sludge inlet of the sludge storage tank.

9. The water treatment system according to claim 8, characterized in that: The mud outlet and mud inlet of the hydrolysis acidification tank are connected and a self-returning sludge pipeline is arranged.

10. The water treatment system according to claim 1, characterized in that: The odor treatment unit also includes a circulating water tank, and the water outlets of the washing and humidifying tower and the biological trickling filter are connected to the water inlet of the circulating water tank. The water outlet of the circulating water tank is provided with a first return pipe connected to the water inlet of the washing and humidifying tower, and a second return pipe connected to the water inlet of the biological trickling filter.

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